I had butterflies in my stomach. "To get/have butterflies in your stomach" is an idiomatic expression that means you are anxious and have a nervous feeling in your stomach. Here's an example: I used to get butterflies in my stomach before school tests.
در روانشناسی: شیدایی، احساس جنون و شیدایی ناشی از عشق و علاقه زیاد
